Canines Flashcards
why are they key?
very strong, can act as abutments for attachments - long, strong roots form part of canine eminence of maxilla
canine guidance/canine disclusion
canines help to keep teeth in line during lateral movements; protect other teeth
no incisal edge
cusp tip instead with cusp slopes/ridges
max canine #s / erupt
6 and 11
erupt b/w 11-12 y, after incisors
max incisors cusp tip
is mesial to crown center (offset to the mesial) therefore the D slope is longer (and M is steeper)
coronal outline features
D more curved, cervical constriction
CEJ convex toward apex
max contacts
M junction of incisal and middle thirds
D in the middle third
max cervical height of contour
prominent facial ridge (in the cervical region)
max root
D or F oriented
conical
smooth and convex from facial view
max height of cingulum
equals half the height of the crown. HUGE cingulum
max position of cingulum
centered M/D
max contour of CEJ
almost flat!
max lingual ridge
a prominent convexity dividing the lingual fossa into two fossae
max marginal ridges (how rounded the proximal surfaces are)
quite convex and prominent
max taper of crown and root
taper dramatically to the lingual - creates a hook that allows it to grab the bone better
max position of cust tip
located toward the mesial
max cingulum location
centered M/D
cusp tip leans
out, toward the facial (so the mands can fit…)
max root features
tapered root on lingual - can see M and D (think of carving)
D depression more likely and more likely to larger
max M/D views compared
CEJ curvature greater on M CEJ concave to apex like others Deeper depression on D slight facial curve of root apex cusp tip slightly facial
maxillary canine numbers
6 and 11
mandibular canine numbers
22 and 27
mandibular canine eruption time
9-10 y
in general, mandibular teeth erupt before their maxillary counterparts
key diffferences: mand candines to max canines
root to crown ratio closer to 1:1 with mandibular canines
mesial outline a lot straighter
distal outline more curve
cusp offset toward mesial (same)
overall anatomy less robust than maxillary counterparts
